Effects of Saline and Alkaline Stresses on Growth and Physiological Changes in Oat (<i>Avena sativa L.</i>) Seedlings

  • Zhanwu GAO Key Laboratory of Vegetation Ecology of Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, 130024
  • Jiayu HAN Key Laboratory of Vegetation Ecology of Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, 130024
  • Chunsheng MU Key Laboratory of Vegetation Ecology of Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, 130024,
  • Jixiang LIN Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Key Laboratory of Saline-Alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education, Harbin, 150040
  • Xiaoyu LI Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Science, Changchun 130012
  • Lidong LIN Dongtou Fisheries Science and Technology Research Institute, Dongtou, 325700
  • Shengnan SUN Key Laboratory of Vegetation Ecology of Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, 130024

Abstract

Two neutral salts (NaCl and Na2SO4) and alkaline salts (NaHCO3 and Na2CO3) were both mixed in 2:1 ratio, and the effects of saline and alkaline stresses on growth and physiological changes in oat seedlings were explored. Result showed that biomass, water content and chlorophyll content decreased while cell membrane permeability significantly increased under alkaline stress. Saline stress did not have obvious effect on pH value in tissue fluids of shoot and root, but alkaline stress increased pH value in root tissue fluid. The contents of Na+, Na+/K+, SO42- increased more, and K+, NO3-,H2PO4- decreased more under alkaline stress, the Cl- content increased obviously under saline stress but had little change under alkaline stress. The increments of proline and organic acid were both greater under alkaline stress, but organic acid content kept the same level under saline stress. Alkaline stress caused more harmful effects on growth and physiological changes in oat seedlings especially broke the pH stability in root tissue fluid. Physiological adaptive mechanisms of oat seedlings under saline stress and alkaline stress were different, which mainly took the way of accumulating organic acid under alkali stress but accumulating Cl- under saline stress.

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Published
2014-12-02
How to Cite
GAO, Z., HAN, J., MU, C., LIN, J., LI, X., LIN, L., & SUN, S. (2014). Effects of Saline and Alkaline Stresses on Growth and Physiological Changes in Oat (<i>Avena sativa L.</i&gt;) Seedlings. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 42(2), 357-362. https://doi.org/10.15835/nbha4229441
Section
Research Articles